you can replace the carbon powder with silicon n use it for copper-aluminum solar cell.
replacing it with silicon gives good efficiency to current gain than loss,and also may provide better supply imitating a solar panel. The basic point is that it absorbed energy from the sun to release power.if you have purchase the #500 solar cell method before,I will tell you how to replace carbon powder with silicon for free likewise the #1500. it for those who as purchase it only. LOCALLY MADE SOLAR CELL N PANEL IS THAT NOT GOOD.